Car-brake.



- R4M0GLASKEY.

CAR BRAKE. APPLIOATION FILED MAY 4, 1912.

' Patented Not 25, 1913;

Inventor O Attorneys EILEY MeoLAsKEY, 0F oARNEYvrnLE', WYO ING.

GAE-BRAKE.

Application filed May 4, 1912. serial "no. esaeoa Specifieation of Letters Patent.

Patented Nov. 1913;-

To all whom it may concern.-

Be it known that I, RlTLEY MoCLAsKEY, a citizen of the United States, residing at Carneyville, in the county of Sheridan and State of lVyoming, have invented anew and useful Car-Brake, of which the following is a specification.

This invention relates to brakes particu larly designed for use on mine ears,- one of the objects of the invention being to provide improved means whereby the brake shoes can be applied quickly and positively to the rims of the wheels, the brake operating mechanism including means whereby the pressures can be equalized upon the wheels.

Another object is to provide means whereby the shoes can be quickly applied with any desired degree of pressure.

A further object is to provide a brake having blocks to which shoes are detachably connected, it being possible to readily and quickly replace the shoes when worn or otherwise rendered unfit for use.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings: Figure 1 is aside elevation of a portion of a car having the present improvements combined therewith. Fig. 2 is a bottom plan view of the car. Fig. 3 is a perspective view of one of the brake blocks and its shoe detached therefrom. Fig. 4 is a rear elevation of the block. Fig. 5 is a section through the block and its shoe.

Referring to the figures by characters of reference A designates a portion of a car body and its wheels have been indicated at B. A rod 1 is j ournaled upon the bottom of the car and its ends are extended between the wheels at the sides of the car, said ends being angular in cross sectional contour, as indicated at 2 and extending through angular openings formed in the centers of cams 3. These cams are thus supported between the wheels B. One of the cams has an arm 4 extending upwardly therefrom and adjustably connected, as by meansof a threaded rod 5, to the angle portion of a bell crank lever 6, one end of the lever being pivotally connected to a bracket 7 on the side of the car while the ether end of the lever is adapted to be placed in engagement with any one of a series of teeth 8 formed on aldar secured to the car: The rod 5 is preferably formed with one end portion extending at a right angle therefrom and through an opening 9 in the lever 6,; a cotter pin 10 or the like being employed for holding the end portion within the opening. Thus it will be seen that when lever 6 is moved downwardly at its free end, arm 4 will be actuated so as to rotate the rod 1, thus simultaneously re tating' the two Gains 3-.

Each, cam is preferably elliptical, the long axis of the cam being disposed obliquely with relation to the longitudinal axis of the arm 4. It is to be understood, of course, that only one of the cams has an arm 1 and, when said arm is actuated, both of the cams will rotate together by reason of the rod 1 connecting them. A bracket 11 is secured to each side of the car and has studs 12 extending in opposite directions therefrom. Loosely mounted on the studs are arms 13 extending upwardly from brace blocks 14. These blocks have grooves 15 in their back faces and said grooves are designed to receive flanges 16 formed annularly upon the cams 3. The front face of each block 14: is concaved and formed with a central recess 17. A brake shoe 18 fits snugly upon the concaved face of the shoe and has an ear 18 extending therefrom and into the recess 17. A fastening bolt 19 extends transversely through recess 17 and ear 18 and is adapted to be held against displacement by a cotter pin 20.

From the foregoing description it will be apparent that under normal conditions the blocks 1a hang downwardly with their shoes 18 out of contact with the wheel rims C. When it is desired to apply the shoes to the wheels, lever 6 is pushed downwardly at its free end. The angle portion of the lever will thus pull on rod 5 and cause arm 4 to rotate the rod 1 and the two cams 3. These cams will bear against the back faces of the blocks 14; and cause the blocks to move apart, thereby bringing the shoes 18 into frictional contact with the rims of the wheels B. The flanges 16, by projecting into the recesses 15, prevent the blocks from becomsaid brake blocks and adapted to actuate the same, a vertical arm rigidly secured to the cam shaft and adapted to rotate the same, a bracket rigidly secured to the car side intermediate the ends of said brake blocks, a bell crank lever pivot-ally secured at one of its extremities to said bracket, the said bell crank lever including a horizontal actuating arm and a vertical arm, an adjustable connection between the said cam shaft vertical arm and the said bell crank lever at the meeting portions of the arms of the same. I

2. A brake including oppositely disposed brake blocks having recesses in their back faces, a cam interposed between the blocks and having an annular flange projecting into the recesses, a bracket secured to the car side and loosely supporting said brake blocks, a cam shaft extending between the brake blocks and supporting cams thereon, an arm rigidly secured to said cam shaft and projecting upwardly therefrom, a bell crank 1 lever including a vertical arm pivotally secured to said car bracket beneath the brake 'block supports, an adjustable connection between the upper extremity of said last men tioned arm and the cam shaft arm, and a horizontal arm projecting from the vertical arm of the said bell crank lever, and means for holding the said horizontal arm in adjusted position.

In testimony that I claim the foregoing A as my own, I have hereto aflixed my signature 1n the presence of two witnesses.

RILEY MGCLASKEY.

Witnesses:

ANDREW J. NIELSEN, CALDER J. CLUBB.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington. D. C. 

